[ViewVC] Annotation of: cvs/IO-AIO/Changes

Revision history for IO::AIO

TODO: better autoconf.pm that can return LIBS etc.
TODO: aio_cptree/mvtree
TODO: reduce condvar fairness: schedule hot-cache-threads first?
TODO: fix setsig
TODO: splice/tee/vmsplice/sync_file_range? (http://kerneltrap.org/node/6505 http://lwn.net/Articles/178199/)

2.4
        - add aio_truncate, aio_chmod, aio_chown, aio_utime (linux
          successfully demonstrated that you can block on futimes...).
        - allow undef as fileoffset for aio_read/write and use read/write(2)
          internally (useful for sockets or O_APPEND handles).
        - allow undef for length in aio_write.
        - negative dataoffsets work as expected now in aio_read/aio_write.
        - use NV instead of UV for 32 bit perls and file offsets, as NVs
          have a larger range then.
        - shared code between BDB and IO::AIO.
        - aio_busy was completely broken. now fixed.
        - readahead emulation now returns something.
        - correctly set errno to ENOSYS on unimplemented functions
          (should never happen, though).
        - large changes to make it partially compile and run on win32,
          but win32 lacks too much functionality, and perl overrides way
          too many functions with crashing versions.

2.33 Tue Jan 23 23:55:41 CET 2007
        - fix install path (Andreas J. Koenig).

2.32 Mon Jan 22 16:56:23 CET 2007
        - added aio_rmtree.
        - wow, aio_mkdir was missing.
        - aio_load did return undef on error, not -1.
        - use prefixexp not prefix in autoconf.pm
          (suggested by ... rt.cpan.org unreachable).
        - avoid installing autoconf.pm.

2.31 Sat Jan  6 03:46:02 CET 2007
        - added aio_load.

2.3  Sat Dec 23 05:48:07 CET 2006
        - fix off-by-one bug in aio_read, causing memory corruption
          or crashes.

2.21  Fri Dec 22 05:03:38 CET 2006
        - minor doc updates.
        - minor cleanups.
        - IO::AIO::poll returns request count.
        - undocumented and unfinished async-signal-reporting.

2.2  Tue Oct 31 00:31:00 CET 2006
        - minor doc updates.
        - added aio_readlink.
        - properly zero-terminate aio_read buffer.
        - fix aio_read/write with nonzero dataoffset.
        - reduced size of aio request structure.
        - better diagnostics when pathnames etc. are not byte-encoded;
          do not leak request in that case, either.

2.1  Sun Oct 29 02:01:57 CET 2006
        - INCOMPATIBLE CHANGE: replace IO::AIO::poll_some by
          IO::AIO::max_poll_reqs and IO::AIO::max_poll_time.
        - fix a bug in aio_move where it would fail everytime
          it would have to copy files manually.
        - doc updates.
        - start threads only on (very low) demand.
        - end superfluous threads automatically after 10s idling.
        - add IO::AIO::max_idle to control this.
        - some tuning applied to random places.
        - add aio_mknod.

2.0  Thu Oct 26 18:27:58 CEST 2006
        - minor incompatibility: max_outstanding semantics have changed.
        - major rewrite, consider all functionality EXPERIMENTAL.
        - aio requests can be cancelled.
        - callbacks can be (re-)set later.
        - aio requests can choose between 9 priorities.
        - add aio_group: aio requests can be grouped
          into composite requests.
        - generator interface for groups.
        - add IO::AIO::poll_some.
        - major documentation improvements.
        - very minor bugfixes.
        - add aio_nop for dummy requests.
        - add aio_busy mainly for benchmarking and debugging.
        - use "fast" mutexes on linux.
        - use dynamic (and larger) buffers instead of
          putting them onto the stack.
        - optimise x86 and amd64 a bit.
        - better error checking when ENOMEM.
        - hopefully fix mem and dirp leaks on fork.
        - warn about broken perl malloc.
        - compiles on cygwin (but pread is broken on cygwin
          which is not detected by autoconf, so you have to
          edit autoconf/config.h yourself to enable emulation).

1.8  Sat Jun 24 22:20:44 CEST 2006
        - add and/or document aio_rename, aio_link, aio_symlink and aio_move.

1.73 Wed Mar  1 22:49:32 CET 2006
        - codename "jost"
        - AIX/Solaris(?) aren't being helpful again, hardcode a value
          for NAME_MAX and drive with your eyes closed (reported by
          wcooley@nakedape.cc).

1.72 Thu Feb  2 00:40:44 CET 2006
        - another minor bug in aio_scandir, again, the callback was called
          twice when the directory can't be stat'ed.

1.71 Mon Dec 26 20:20:03 CET 2005
        - grr, another minor bug in aio_scandir, this time resulting
          in a runtime error.

1.7  Mon Dec 26 19:29:48 CET 2005
        - aio_scandir errornously called callback twice in some cases.
        - added AnyEvent example.

1.61 Wed Sep  7 19:40:42 CEST 2005
        - no longer include $Config{libs}, as distros include too much
          garbage in there that is not installed on typical systems
          (for example, debian links perl against -lgdbm and many more
          libraries despite perl not needing it, slowing down startup and
          wasting memory).

1.6  Tue Aug 30 17:44:44 CEST 2005
        - added aio_readdir, aio_scandir.
        - added aio_sendfile, including sendfile emulation when sendfile
          isn't available. Linux, FreeBSD and HP-UX might work (sendfilev
          support is unavailable on my solaris 8 machine, but preliminary
          code is there. What's lacking is configury stuff and testing...).

1.5  Sat Aug 20 02:32:19 CEST 2005
        - create the aio threads on demand only (good after forking).
        - somebody nagged about C89 compatibility, so this release should
          be C89 compatible, but no guarantees for future ones.
        - abort when the configure script fails.

1.4  Wed Aug 17 08:07:27 CEST 2005
        - forgot to recreate the pipe after forking, this could cause
          deadlocks.

1.3  Wed Aug 17 07:25:54 CEST 2005
        - properly propagate exceptions from callbacks, instead of silently
          eating them.
        - use a different fork algorithm that avoids recursive callback
          invocations and reduces fork latency in busy processes.
        - fix a bug where the buffer scalar in aio_read got assigned the wrong
          length after reading.
        - fix a bug where the child would process some outstanding requests
          from the parent.
        - make a copy of the callback scalar, to avoid some very uncommon
          (but valid) usages where the callback scalar changes.
        - the callback was never freed in aio_read/aio_write.
        - aio_read/aio_write will now set the readonly flag on the data
          scalar for better error reporting.

1.2  Wed Aug 17 01:22:58 CEST 2005
        - verified on cygwin, linux/amd64+ia32+alpha, solaris.
        - use SvPVbyte for filenames now. You *need* to encode your strings to
          the external filename encoding first.
        - fix the bug where filehandles could leak (again).
        - clarify freebsd situation: make it work and tell me how, or go away
          with your underdocumented, broken and outdated OS.
        - fork'ing should now be officially supported (where linux and
          posix contradict each other, I followed posix).
        - only call read() once per poll, not twice (speedup).
        - new functions: aio_rmdir, aio_symlink.
        - force callback arguments to be undef or a reference, for better
          error catching.

1.1  Sun Aug  7 05:27:23 CEST 2005
        - added configure script to detect availability of some calls.
          (imperfect, as we cannot detect things like -lrt due to missing
          feedback yet).
        - emulate fdatasync via fsync, pread/pwrite via unsafe read/write
          and readahead via manual reading on platforms lacking those.
        - ported t/03_errors.t+framework by Brad Fitzpatrick
          from Linux::AIO.
        - removed XOPEN_SOURCE because stupid solaris 9 doesn't
          compile with it enabled. Probably breaks others. Oh well.
        - try to be more careful with errno on non-threaded perls.
        - cygwins perl insisted on a matching open mode when morphing
          the fd to an fh.
        - convert sv's to "byte" encoding in aio_read/aio_write. Might
          do that for pathnames, too, in the future, so make sure you
          properly encode your pathnames.

1.0  Fri Jul 22 10:43:30 CEST 2005
        - aio_open did not reliably deliver (open) filehandles.
        - all aio_*-functions keep a reference to the filehandle so
          it doesn't go away while the aio requests is working on it.
        - disable warnings in AIO.pm.

0.9  Wed Jul 20 23:55:04 CEST 2005
        - allow recursive calls to poll_cb, use less locking calls, too.
        - fix the Gtk2-example in the SYNOPSIS.
        - use pread/pwrite not pread64/pwrite64. this was simply a leftover
          from Linux::AIO.
          (found by compiling on cygwin. Unfortunately, cygwin declares but
          does not implement pread/pwrite).
        - only include <sys/syscall.h> on linux.

0.5  Tue Jul 12 13:03:09 CEST 2005
        - removed #include <endian.h>, it's not portable, and we don't
          need it anyway.
        - link against -lrt, as it might contain goodies such as fdatasync,
          and often aio_read, which we do not use yet, but it shouldn't hurt.

0.4  Mon Jul 11 05:28:25 CEST 2005
        - added IO::AIO::flush, IO::AIO::poll.
        - make callback argument optional for all calls.

0.3  Mon Jul 11 01:42:37 CEST 2005
        - restructured manpage.
        - added SYNOPSIS with examples for Event, Glib, Tk.
        - remove explicit context support so I don't have to maintain
          it for threaded perls (i.e. it should work now :).

0.2  Sun Jul 10 22:57:12 CEST 2005
        - return immediately from poll_wait if nreqs==0.
        - get rid of the request pipe and use faster thread-thread
          communications for most requests and responses.

0.1
        - cloned from Linux::AIO, which is very similar.

Revision:	1.127
Committed:	Sun Jul 8 09:09:34 2007 UTC (16 years, 10 months ago) by root
Branch:	MAIN
Changes since 1.126:	+7 -3 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.31	Revision history for IO::AIO
2	root	1.30
3	root	1.59	TODO: better autoconf.pm that can return LIBS etc.
4	root	1.114	TODO: aio_cptree/mvtree
5	root	1.106	TODO: reduce condvar fairness: schedule hot-cache-threads first?
6	root	1.109	TODO: fix setsig
7	root	1.123	TODO: splice/tee/vmsplice/sync_file_range? (http://kerneltrap.org/node/6505 http://lwn.net/Articles/178199/)
8	root	1.100
9	root	1.121	2.4
10	root	1.127	- add aio_truncate, aio_chmod, aio_chown, aio_utime (linux
11			successfully demonstrated that you can block on futimes...).
12	root	1.124	- allow undef as fileoffset for aio_read/write and use read/write(2)
13			internally (useful for sockets or O_APPEND handles).
14	root	1.126	- allow undef for length in aio_write.
15			- negative dataoffsets work as expected now in aio_read/aio_write.
16	root	1.124	- use NV instead of UV for 32 bit perls and file offsets, as NVs
17	root	1.125	have a larger range then.
18	root	1.120	- shared code between BDB and IO::AIO.
19	root	1.127	- aio_busy was completely broken. now fixed.
20			- readahead emulation now returns something.
21	root	1.121	- correctly set errno to ENOSYS on unimplemented functions
22			(should never happen, though).
23	root	1.127	- large changes to make it partially compile and run on win32,
24			but win32 lacks too much functionality, and perl overrides way
25			too many functions with crashing versions.
26	root	1.120
27	root	1.119	2.33 Tue Jan 23 23:55:41 CET 2007
28			- fix install path (Andreas J. Koenig).
29
30	root	1.118	2.32 Mon Jan 22 16:56:23 CET 2007
31	root	1.114	- added aio_rmtree.
32	root	1.115	- wow, aio_mkdir was missing.
33	root	1.116	- aio_load did return undef on error, not -1.
34	root	1.117	- use prefixexp not prefix in autoconf.pm
35			(suggested by ... rt.cpan.org unreachable).
36	root	1.118	- avoid installing autoconf.pm.
37	root	1.114
38	root	1.113	2.31 Sat Jan 6 03:46:02 CET 2007
39	root	1.112	- added aio_load.
40
41	root	1.111	2.3 Sat Dec 23 05:48:07 CET 2006
42			- fix off-by-one bug in aio_read, causing memory corruption
43			or crashes.
44
45	root	1.110	2.21 Fri Dec 22 05:03:38 CET 2006
46	root	1.108	- minor doc updates.
47	root	1.107	- minor cleanups.
48			- IO::AIO::poll returns request count.
49	root	1.109	- undocumented and unfinished async-signal-reporting.
50	root	1.107
51	root	1.103	2.2 Tue Oct 31 00:31:00 CET 2006
52	root	1.100	- minor doc updates.
53	root	1.101	- added aio_readlink.
54			- properly zero-terminate aio_read buffer.
55			- fix aio_read/write with nonzero dataoffset.
56	root	1.104	- reduced size of aio request structure.
57	root	1.106	- better diagnostics when pathnames etc. are not byte-encoded;
58	root	1.105	do not leak request in that case, either.
59	root	1.94
60	root	1.99	2.1 Sun Oct 29 02:01:57 CET 2006
61	root	1.98	- INCOMPATIBLE CHANGE: replace IO::AIO::poll_some by
62			IO::AIO::max_poll_reqs and IO::AIO::max_poll_time.
63	root	1.95	- fix a bug in aio_move where it would fail everytime
64			it would have to copy files manually.
65	root	1.98	- doc updates.
66	root	1.94	- start threads only on (very low) demand.
67	root	1.97	- end superfluous threads automatically after 10s idling.
68	root	1.98	- add IO::AIO::max_idle to control this.
69	root	1.94	- some tuning applied to random places.
70	root	1.95	- add aio_mknod.
71	root	1.59
72	root	1.92	2.0 Thu Oct 26 18:27:58 CEST 2006
73	root	1.90	- minor incompatibility: max_outstanding semantics have changed.
74	root	1.86	- major rewrite, consider all functionality EXPERIMENTAL.
75	root	1.68	- aio requests can be cancelled.
76	root	1.81	- callbacks can be (re-)set later.
77	root	1.93	- aio requests can choose between 9 priorities.
78	root	1.83	- add aio_group: aio requests can be grouped
79			into composite requests.
80			- generator interface for groups.
81	root	1.89	- add IO::AIO::poll_some.
82	root	1.72	- major documentation improvements.
83			- very minor bugfixes.
84	root	1.76	- add aio_nop for dummy requests.
85	root	1.84	- add aio_busy mainly for benchmarking and debugging.
86	root	1.79	- use "fast" mutexes on linux.
87	root	1.80	- use dynamic (and larger) buffers instead of
88			putting them onto the stack.
89			- optimise x86 and amd64 a bit.
90			- better error checking when ENOMEM.
91	root	1.85	- hopefully fix mem and dirp leaks on fork.
92	root	1.92	- warn about broken perl malloc.
93	root	1.88	- compiles on cygwin (but pread is broken on cygwin
94			which is not detected by autoconf, so you have to
95			edit autoconf/config.h yourself to enable emulation).
96	root	1.68
97	root	1.67	1.8 Sat Jun 24 22:20:44 CEST 2006
98	root	1.66	- add and/or document aio_rename, aio_link, aio_symlink and aio_move.
99
100	root	1.65	1.73 Wed Mar 1 22:49:32 CET 2006
101			- codename "jost"
102			- AIX/Solaris(?) aren't being helpful again, hardcode a value
103			for NAME_MAX and drive with your eyes closed (reported by
104			wcooley@nakedape.cc).
105	root	1.63
106	root	1.62	1.72 Thu Feb 2 00:40:44 CET 2006
107	root	1.61	- another minor bug in aio_scandir, again, the callback was called
108			twice when the directory can't be stat'ed.
109
110	root	1.60	1.71 Mon Dec 26 20:20:03 CET 2005
111			- grr, another minor bug in aio_scandir, this time resulting
112			in a runtime error.
113
114	root	1.59	1.7 Mon Dec 26 19:29:48 CET 2005
115	root	1.58	- aio_scandir errornously called callback twice in some cases.
116	root	1.57	- added AnyEvent example.
117
118	root	1.55	1.61 Wed Sep 7 19:40:42 CEST 2005
119	root	1.54	- no longer include $Config{libs}, as distros include too much
120	root	1.56	garbage in there that is not installed on typical systems
121	root	1.54	(for example, debian links perl against -lgdbm and many more
122			libraries despite perl not needing it, slowing down startup and
123			wasting memory).
124
125	root	1.53	1.6 Tue Aug 30 17:44:44 CEST 2005
126			- added aio_readdir, aio_scandir.
127	root	1.51	- added aio_sendfile, including sendfile emulation when sendfile
128			isn't available. Linux, FreeBSD and HP-UX might work (sendfilev
129			support is unavailable on my solaris 8 machine, but preliminary
130			code is there. What's lacking is configury stuff and testing...).
131	root	1.46
132	root	1.44	1.5 Sat Aug 20 02:32:19 CEST 2005
133	root	1.51	- create the aio threads on demand only (good after forking).
134	root	1.41	- somebody nagged about C89 compatibility, so this release should
135	root	1.42	be C89 compatible, but no guarantees for future ones.
136	root	1.43	- abort when the configure script fails.
137	root	1.41
138	root	1.40	1.4 Wed Aug 17 08:07:27 CEST 2005
139	root	1.93	- forgot to recreate the pipe after forking, this could cause
140	root	1.40	deadlocks.
141
142	root	1.39	1.3 Wed Aug 17 07:25:54 CEST 2005
143	root	1.33	- properly propagate exceptions from callbacks, instead of silently
144			eating them.
145	root	1.38	- use a different fork algorithm that avoids recursive callback
146			invocations and reduces fork latency in busy processes.
147	root	1.37	- fix a bug where the buffer scalar in aio_read got assigned the wrong
148			length after reading.
149			- fix a bug where the child would process some outstanding requests
150			from the parent.
151			- make a copy of the callback scalar, to avoid some very uncommon
152			(but valid) usages where the callback scalar changes.
153			- the callback was never freed in aio_read/aio_write.
154	root	1.38	- aio_read/aio_write will now set the readonly flag on the data
155			scalar for better error reporting.
156	root	1.33
157	root	1.32	1.2 Wed Aug 17 01:22:58 CEST 2005
158			- verified on cygwin, linux/amd64+ia32+alpha, solaris.
159	root	1.31	- use SvPVbyte for filenames now. You need to encode your strings to
160			the external filename encoding first.
161	root	1.32	- fix the bug where filehandles could leak (again).
162	root	1.31	- clarify freebsd situation: make it work and tell me how, or go away
163			with your underdocumented, broken and outdated OS.
164			- fork'ing should now be officially supported (where linux and
165			posix contradict each other, I followed posix).
166	root	1.32	- only call read() once per poll, not twice (speedup).
167			- new functions: aio_rmdir, aio_symlink.
168	root	1.31	- force callback arguments to be undef or a reference, for better
169			error catching.
170	root	1.1
171	root	1.29	1.1 Sun Aug 7 05:27:23 CEST 2005
172	root	1.25	- added configure script to detect availability of some calls.
173	root	1.27	(imperfect, as we cannot detect things like -lrt due to missing
174	root	1.23	feedback yet).
175	root	1.27	- emulate fdatasync via fsync, pread/pwrite via unsafe read/write
176			and readahead via manual reading on platforms lacking those.
177	root	1.19	- ported t/03_errors.t+framework by Brad Fitzpatrick
178			from Linux::AIO.
179	root	1.18	- removed XOPEN_SOURCE because stupid solaris 9 doesn't
180			compile with it enabled. Probably breaks others. Oh well.
181	root	1.24	- try to be more careful with errno on non-threaded perls.
182	root	1.26	- cygwins perl insisted on a matching open mode when morphing
183			the fd to an fh.
184	root	1.28	- convert sv's to "byte" encoding in aio_read/aio_write. Might
185			do that for pathnames, too, in the future, so make sure you
186			properly encode your pathnames.
187	root	1.18
188	root	1.17	1.0 Fri Jul 22 10:43:30 CEST 2005
189			- aio_open did not reliably deliver (open) filehandles.
190	root	1.16	- all aio_*-functions keep a reference to the filehandle so
191			it doesn't go away while the aio requests is working on it.
192			- disable warnings in AIO.pm.
193
194	root	1.15	0.9 Wed Jul 20 23:55:04 CEST 2005
195			- allow recursive calls to poll_cb, use less locking calls, too.
196			- fix the Gtk2-example in the SYNOPSIS.
197	root	1.14	- use pread/pwrite not pread64/pwrite64. this was simply a leftover
198			from Linux::AIO.
199			(found by compiling on cygwin. Unfortunately, cygwin declares but
200			does not implement pread/pwrite).
201			- only include <sys/syscall.h> on linux.
202
203	root	1.13	0.5 Tue Jul 12 13:03:09 CEST 2005
204	root	1.12	- removed #include <endian.h>, it's not portable, and we don't
205			need it anyway.
206			- link against -lrt, as it might contain goodies such as fdatasync,
207			and often aio_read, which we do not use yet, but it shouldn't hurt.
208
209	root	1.11	0.4 Mon Jul 11 05:28:25 CEST 2005
210	root	1.9	- added IO::AIO::flush, IO::AIO::poll.
211	root	1.10	- make callback argument optional for all calls.
212	root	1.8
213	root	1.7	0.3 Mon Jul 11 01:42:37 CEST 2005
214	root	1.5	- restructured manpage.
215	root	1.7	- added SYNOPSIS with examples for Event, Glib, Tk.
216			- remove explicit context support so I don't have to maintain
217			it for threaded perls (i.e. it should work now :).
218	root	1.5
219	root	1.4	0.2 Sun Jul 10 22:57:12 CEST 2005
220	root	1.2	- return immediately from poll_wait if nreqs==0.
221			- get rid of the request pipe and use faster thread-thread
222	root	1.3	communications for most requests and responses.
223	root	1.2
224	root	1.1	0.1
225			- cloned from Linux::AIO, which is very similar.
226